This is an appeal by plaintiff from a judgment in favor of the defendants in an action brought to recover the sum of three thousand dollars, due upon a promissory note executed by defendant Edwin H. Williams in favor of the plaintiff, and which by an agreement subsequently entered into between Williams and his codefendant Robert L. Coleman the latter undertook to pay. Coleman haying died after the commencement of the action, his executrix, Frances E. Coleman, was substituted as defendant in his stead.

The plaintiff and Robert L. Coleman were copartners doing business under the name of Aleo Taxicab Company when, on January 1, 1916, the former sold all his interest in the concern to Edwin H. Williams, and the note in suit was given by Williams as a portion of the purchase price thereof. The note was payable in monthly installments. On the day that the note was executed, and as a part of the same transaction, the plaintiff executed the following writing:

On January 25, 1916, and shortly after the above transaction, Coleman purchased, from Williams his newly acquired interest in the Aleo Taxicab Company, and in connection with said purchase executed and delivered to Williams a writing in terms as follows:

The note referred to in this writing is the same as that above referred to.

In May, 1917, Coleman sold and disposed of the business, and in August of that year, the monthly payments upon the aforesaid note having been made up to that time, notified the plaintiff in writing that the business of said concern had proved a failure, and that he had under the authority given him by the document of date January 1, 1916, hereinabove set out, accepted a compromise in the sum of ten dollars of the Williams note, accompanying said notification with a check drawn by himself for that amount.

There is nothing in the record to show that Mamlock was informed of Coleman’s agreement with Williams to pay said note, or that the purported compromise was not in fact had with Williams. Mamlock neither cashed nor returned said cheek, but on September 13, 1917, about five weeks after its receipt, brought this action to recover the amount then due upon the note. By a supplemental complaint the amount due was fhjed at three thousand dollars.

Answers were filed by both Williams and Coleman’s executrix, in both of which the aforesaid alleged compromise is pleaded as a discharge and satisfaction of the note sued upon. The trial court found in accordance with this defense, and judgment was entered in favor of the defendants.

In support of his appeal it is urged by the plaintiff that the trial court was in error in holding that the purported compromise by Coleman of the note in suit and his tender of a cheek for ten dollars to the plaintiff operated as payment and discharge of the note; and we think that this contention of the appellant must be sustained.

[1] Coleman, as the agent of Mamlock for the collection of the note, with authority in a certain contingency to enter into a compromise with its maker, was bound to act in the highest good faith toward his principal. In respect of this agency he was under some of the disabilities of a trustee (Civ. Code, see. 2322). He was inhibited from obtaining any advantage over him by the slightest concealment (Civ. Code, sec. 2228) ; he could not enter into any transaction connected with his trust in which his interest would be adverse to that of his principal (Civ. Code, see. 2230; Watkins' Estate, 121 Cal. 327 [ 53 Pac. 702 ]); and it was his duty immediately to disclose to his principal his adverse interest (Civ. Code, see. 2233), and any violation of these duties constitutes a fraud against the principal (Civ. Code, sec. 2234). [2] As already remarked, there is no evidence in the record of a disclosure by Coleman to Mamlock of the fact that he had by agreement with Williams become responsible for the payment of the note; and in his letter to Mamlock advising him of the purported compromise he states, “I have compromised the said note for the sum of ten dollars, and have given full and complete receipts and acquittances therefor,” clearly intending to convey the impression to Mam-lock that the compromise had been made with another person than himself. We think it obvious that if the contingency foreseen in the written appointment of Coleman as Mamlock’s agen,t arose, authorizing the making of a com promise, it was Coleman’s duty, having himself been liable on the note, to negotiate directly with Mamloek with a view to effecting such compromise, and not to place himself in the impossible situation of negotiating with himself for a compromise of his own indebtedness.

[3] The respondents attach some weight to the failure of Mamloek to return to Coleman the ten dollar check, claiming that its retention for some five weeks before the commencement of this action amounted to its acceptance as payment of the note notwithstanding that it had not been presented for payment. No question arises here as to any prejudice suffered by the drawer of the check by reason of delay in its presentation for payment, sole reliance being placed upon the mere retention of the check. On this point it is sufficient to say that the check did not purport to be payment of anything due from Coleman to Mamloek, but at most the forwarding by means of a check by an agent of money belonging to his" principal. Under these circumstances the question of payment by check and the rules of law relating thereto do not arise.

For the reasons given the judgment is reversed.

Waste, P. J., and. Richards, J., concurred.